What exactly is happiness that we spend our lives pursuing it more fiercely than anything else? The answer, Drs. Lickerman and ElDifrawi argue, is that happiness isn't just a good feeling but a special good feeling--in fact, the best good feeling we're capable of having. Enduring happiness is something we all want yet many of us fail to achieve. Look around you. How many people do you know who would say they feel a constant and...